At least 25 people (out of 50) do not play on our team. Can we delete those team members?

As a team Leader yes u can!

How would they do this. Will need to pass instructions on to my team leader

There is no team leader on the team I was on so couldn’t get rid of inactive players. No one on that team had”leader” under their name. There were at least 35 people on that team that never played. I became a leader on my own team which has 1 member, me, but cannot get back to old team because it’s full of inactive players.